Eduard Sjoukes
/
PWMout_AnalogIn
How to use a potentiometer to change the duty cycle of a PWM signal
main.cpp
- Committer:
- Eduard
- Date:
- 2012-11-04
- Revision:
- 0:1ece86581178
File content as of revision 0:1ece86581178:
#include "mbed.h" PwmOut led(LED1); // Led on board PwmOut green(p25); // A green led is connected at Pin25 with resistor to ground AnalogIn ain(p20); // Potmeter 810k connected between VOUT(3.3V Pin40) and GND (Pin1) with the wiper connect to Pin20 int main() { green.period_us(100); // Set the period to 100uS = 10kHz led.period_ms(10); // Set the period to 10mS = 100Hz // Both periods will be set on 10mS, because the same timer is used for both // Changing the period for one wil change the period for the others also while(1) { led = ain; // Set duty cycle for LED1 green = ain/2; // Set duty cycle for the green led, the "on" time will only the half of the period } }